Vulnerability · NVD

CVE-2026-4726

HIGH 7.5 Published on 2026-03-24

Denial-of-service in the XML component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS 0.53% exploit very unlikely percentile 42.0%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <149.0 Fixed in 149.0 Latest tracked 153.0.2 patched

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<149.0	cpe:2.3:a:mozilla:thunderbird:::::-:::*